content: package net.minecraft.server;
  
  // CraftBukkit start
  import java.util.ArrayList;
  import org.bukkit.event.block.BlockBreakEvent;
  import org.bukkit.craftbukkit.event.CraftEventFactory;
  import org.bukkit.event.Event;
  import org.bukkit.event.block.Action;
  import org.bukkit.event.player.PlayerInteractEvent;
  // CraftBukkit end
  
  public class PlayerInteractManager {
  
      public World world;
      public EntityPlayer player;
      private EnumGamemode gamemode;
      private boolean d;
      private int lastDigTick;
      private BlockPosition f;
      private int currentTick;
      private boolean h;
      private BlockPosition i;
      private int j;
      private int k;
  
      public PlayerInteractManager(World world) {
          this.gamemode = EnumGamemode.NOT_SET;
          this.f = BlockPosition.ZERO;
          this.i = BlockPosition.ZERO;
          this.k = -1;
          this.world = world;
      }
  
      public void setGameMode(EnumGamemode enumgamemode) {
          this.gamemode = enumgamemode;
          enumgamemode.a(this.player.abilities);
          this.player.updateAbilities();
          this.player.server.getPlayerList().sendAll(new PacketPlayOutPlayerInfo(PacketPlayOutPlayerInfo.EnumPlayerInfoAction.UPDATE_GAME_MODE, new EntityPlayer[] { this.player}), this.player); // CraftBukkit
          this.world.everyoneSleeping();
      }
  
      public EnumGamemode getGameMode() {
          return this.gamemode;
      }
  
      public boolean c() {
          return this.gamemode.e();
      }
  
      public boolean isCreative() {
          return this.gamemode.isCreative();
      }
  
      public void b(EnumGamemode enumgamemode) {
          if (this.gamemode == EnumGamemode.NOT_SET) {
              this.gamemode = enumgamemode;
          }
  
          this.setGameMode(this.gamemode);
      }
  
      public void a() {
          this.currentTick = MinecraftServer.currentTick; // CraftBukkit;
          float f;
          int i;
  
          if (this.h) {
              int j = this.currentTick - this.j;
              IBlockData iblockdata = this.world.getType(this.i);
  
              if (iblockdata.getMaterial() == Material.AIR) {
                  this.h = false;
              } else {
                  f = iblockdata.a((EntityHuman) this.player, this.player.world, this.i) * (float) (j + 1);
                  i = (int) (f * 10.0F);
                  if (i != this.k) {
                      this.world.c(this.player.getId(), this.i, i);
                      this.k = i;
                  }
  
                  if (f >= 1.0F) {
                      this.h = false;
                      this.breakBlock(this.i);
                  }
              }
          } else if (this.d) {
              IBlockData iblockdata1 = this.world.getType(this.f);
  
              if (iblockdata1.getMaterial() == Material.AIR) {
                  this.world.c(this.player.getId(), this.f, -1);
                  this.k = -1;
                  this.d = false;
              } else {
                  int k = this.currentTick - this.lastDigTick;
  
                  f = iblockdata1.a((EntityHuman) this.player, this.player.world, this.i) * (float) (k + 1);
                  i = (int) (f * 10.0F);
                  if (i != this.k) {
                      this.world.c(this.player.getId(), this.f, i);
                      this.k = i;
                  }
              }
          }
  
      }
  
      public void a(BlockPosition blockposition, EnumDirection enumdirection) {
          // CraftBukkit start
          PlayerInteractEvent event = CraftEventFactory.callPlayerInteractEvent(this.player, Action.LEFT_CLICK_BLOCK, blockposition, enumdirection, this.player.inventory.getItemInHand(), EnumHand.MAIN_HAND);
          if (event.isCancelled()) {
              // Let the client know the block still exists
              ((EntityPlayer) this.player).playerConnection.sendPacket(new PacketPlayOutBlockChange(this.world, blockposition));
              cancelBreakBlock(blockposition, this.world.getType(blockposition)); // Paper - Avoid visual issues on the client
              // Update any tile entity data for this block
              TileEntity tileentity = this.world.getTileEntity(blockposition);
              if (tileentity != null) {
                  this.player.playerConnection.sendPacket(tileentity.getUpdatePacket());
              }
              return;
          }
          // CraftBukkit end
          if (this.isCreative()) {
              if (!this.world.douseFire((EntityHuman) null, blockposition, enumdirection)) {
                  this.breakBlock(blockposition);
              }
  
          } else {
              IBlockData iblockdata = this.world.getType(blockposition);
              Block block = iblockdata.getBlock();
  
              if (this.gamemode.c()) {
                  if (this.gamemode == EnumGamemode.SPECTATOR) {
                      return;
                  }
  
                  if (!this.player.dk()) {
                      ItemStack itemstack = this.player.getItemInMainHand();
  
                      if (itemstack.isEmpty()) {
                          return;
                      }
  
                      if (!itemstack.a(block)) {
                          return;
                      }
                  }
              }
  
              // this.world.douseFire((EntityHuman) null, blockposition, enumdirection); // CraftBukkit - Moved down
              this.lastDigTick = this.currentTick;
              float f = 1.0F;
  
              // CraftBukkit start - Swings at air do *NOT* exist.
              if (event.useInteractedBlock() == Event.Result.DENY) {
                  // If we denied a door from opening, we need to send a correcting update to the client, as it already opened the door.
                  IBlockData data = this.world.getType(blockposition);
                  if (block == Blocks.WOODEN_DOOR) {
                      // For some reason *BOTH* the bottom/top part have to be marked updated.
                      boolean bottom = data.get(BlockDoor.HALF) == BlockDoor.EnumDoorHalf.LOWER;
                      ((EntityPlayer) this.player).playerConnection.sendPacket(new PacketPlayOutBlockChange(this.world, blockposition));
                      ((EntityPlayer) this.player).playerConnection.sendPacket(new PacketPlayOutBlockChange(this.world, bottom ? blockposition.up() : blockposition.down()));
                  } else if (block == Blocks.TRAPDOOR) {
                      ((EntityPlayer) this.player).playerConnection.sendPacket(new PacketPlayOutBlockChange(this.world, blockposition));
                  }
              } else if (iblockdata.getMaterial() != Material.AIR) {
                  block.attack(this.world, blockposition, this.player);
                  f = iblockdata.a((EntityHuman) this.player, this.player.world, blockposition);
                  // Allow fire punching to be blocked
                  this.world.douseFire((EntityHuman) null, blockposition, enumdirection);
              }
  
              if (event.useItemInHand() == Event.Result.DENY) {
                  // If we 'insta destroyed' then the client needs to be informed.
                  if (f > 1.0f) {
                      ((EntityPlayer) this.player).playerConnection.sendPacket(new PacketPlayOutBlockChange(this.world, blockposition));
                  }
                  return;
              }
              org.bukkit.event.block.BlockDamageEvent blockEvent = CraftEventFactory.callBlockDamageEvent(this.player, blockposition.getX(), blockposition.getY(), blockposition.getZ(), this.player.inventory.getItemInHand(), f >= 1.0f);
  
              if (blockEvent.isCancelled()) {
                  // Let the client know the block still exists
                  ((EntityPlayer) this.player).playerConnection.sendPacket(new PacketPlayOutBlockChange(this.world, blockposition));
                  return;
              }
  
              if (blockEvent.getInstaBreak()) {
                  f = 2.0f;
              }
              // CraftBukkit end
  
              if (iblockdata.getMaterial() != Material.AIR && f >= 1.0F) {
                  this.breakBlock(blockposition);
              } else {
                  this.d = true;
                  this.f = blockposition;
                  int i = (int) (f * 10.0F);
  
                  this.world.c(this.player.getId(), blockposition, i);
                  this.player.playerConnection.sendPacket(new PacketPlayOutBlockChange(world, blockposition)); // Paper - MC-54026 - backport from 1.13
                  this.k = i;
              }
  
          }
  
          this.world.chunkPacketBlockController.updateNearbyBlocks(this.world, blockposition); // Paper - Anti-Xray
      }
  
      public void a(BlockPosition blockposition) {
          if (blockposition.equals(this.f)) {
              this.currentTick = MinecraftServer.currentTick; // CraftBukkit
              int i = this.currentTick - this.lastDigTick;
              IBlockData iblockdata = this.world.getType(blockposition);
  
              if (iblockdata.getMaterial() != Material.AIR) {
                  float f = iblockdata.a((EntityHuman) this.player, this.player.world, blockposition) * (float) (i + 1);
  
                  if (f >= 0.7F) {
                      this.d = false;
                      this.world.c(this.player.getId(), blockposition, -1);
                      this.breakBlock(blockposition);
                  } else if (!this.h) {
                      this.d = false;
                      this.h = true;
                      this.i = blockposition;
                      this.j = this.lastDigTick;
                  }
              }
          // CraftBukkit start - Force block reset to client
          } else {
              this.player.playerConnection.sendPacket(new PacketPlayOutBlockChange(this.world, blockposition));
              // CraftBukkit end
          }
  
      }
  
      public void e() {
          this.d = false;
          this.world.c(this.player.getId(), this.f, -1);
      }
  
      private boolean c(BlockPosition blockposition) {
          IBlockData iblockdata = this.world.getType(blockposition);
  
          iblockdata.getBlock().a(this.world, blockposition, iblockdata, (EntityHuman) this.player);
          boolean flag = this.world.setAir(blockposition);
  
          if (flag) {
              iblockdata.getBlock().postBreak(this.world, blockposition, iblockdata);
          }
  
          return flag;
      }
  
      // Paper start - Extra method to avoid visual issues on the client when cancelling block breaks
      private void cancelBreakBlock(BlockPosition position, IBlockData data) {
          Block block = data.getBlock();
          // Send other half of the door
          if (block instanceof BlockDoor) {
              boolean bottom = data.get(BlockDoor.HALF) == BlockDoor.EnumDoorHalf.LOWER;
              this.player.playerConnection.sendPacket(new PacketPlayOutBlockChange(world, bottom ? position.up() : position.down()));
          } else if (block instanceof BlockTallPlant) {
              boolean bottom = data.get(BlockTallPlant.HALF) == BlockTallPlant.EnumTallPlantHalf.LOWER;
              this.player.playerConnection.sendPacket(new PacketPlayOutBlockChange(world, bottom ? position.up() : position.down()));
          } else if (block instanceof BlockPistonExtension) {
              BlockPosition piston = position.shift(data.get(BlockPistonExtension.FACING).opposite());
              this.player.playerConnection.sendPacket(new PacketPlayOutBlockChange(world, piston));
          } else if (block instanceof BlockBed) {
              if (data.get(BlockBed.PART) == BlockBed.EnumBedPart.FOOT) {
                  // Restore head of bed
                  BlockPosition head = position.shift(data.get(BlockBed.FACING));
                  this.player.playerConnection.sendPacket(new PacketPlayOutBlockChange(world, head));
  
                  TileEntity tileentity = this.world.getTileEntity(head);
                  if (tileentity != null) {
                      this.player.playerConnection.sendPacket(tileentity.getUpdatePacket());
                  }
              }
          }
      }
      // Paper end
  
      public boolean breakBlock(BlockPosition blockposition) {
          // CraftBukkit start - fire BlockBreakEvent
          BlockBreakEvent event = null;
  
          if (this.player instanceof EntityPlayer) {
              org.bukkit.block.Block block = this.world.getWorld().getBlockAt(blockposition.getX(), blockposition.getY(), blockposition.getZ());
  
              // Sword + Creative mode pre-cancel
              boolean isSwordNoBreak = this.gamemode.isCreative() && !this.player.getItemInMainHand().isEmpty() && this.player.getItemInMainHand().getItem() instanceof ItemSword;
  
              // Tell client the block is gone immediately then process events
              // Don't tell the client if its a creative sword break because its not broken!
              if (world.getTileEntity(blockposition) == null && !isSwordNoBreak) {
                  PacketPlayOutBlockChange packet = new PacketPlayOutBlockChange(this.world, blockposition);
                  packet.block = Blocks.AIR.getBlockData();
                  ((EntityPlayer) this.player).playerConnection.sendPacket(packet);
              }
  
              event = new BlockBreakEvent(block, this.player.getBukkitEntity());
  
              // Sword + Creative mode pre-cancel
              event.setCancelled(isSwordNoBreak);
  
              // Calculate default block experience
              IBlockData nmsData = this.world.getType(blockposition);
              Block nmsBlock = nmsData.getBlock();
  
              ItemStack itemstack = this.player.getEquipment(EnumItemSlot.MAINHAND);
  
              if (nmsBlock != null && !event.isCancelled() && !this.isCreative() && this.player.hasBlock(nmsBlock.getBlockData())) {
                  // Copied from block.a(World world, EntityHuman entityhuman, BlockPosition blockposition, IBlockData iblockdata, @Nullable TileEntity tileentity, ItemStack itemstack)
                  // PAIL: checkme each update
                  if (!(nmsBlock.o() && EnchantmentManager.getEnchantmentLevel(Enchantments.SILK_TOUCH, itemstack) > 0)) {
                      int bonusLevel = EnchantmentManager.getEnchantmentLevel(Enchantments.LOOT_BONUS_BLOCKS, itemstack);
  
                      event.setExpToDrop(nmsBlock.getExpDrop(this.world, nmsData, bonusLevel));
                  }
              }
  
              this.world.getServer().getPluginManager().callEvent(event);
  
              if (event.isCancelled()) {
                  if (isSwordNoBreak) {
                      return false;
                  }
                  // Let the client know the block still exists
                  ((EntityPlayer) this.player).playerConnection.sendPacket(new PacketPlayOutBlockChange(this.world, blockposition));
                  cancelBreakBlock(blockposition, nmsData); // Paper - Move cancellation code to extra "cancelBreakBlock" method
                  // Update any tile entity data for this block
                  TileEntity tileentity = this.world.getTileEntity(blockposition);
                  if (tileentity != null) {
                      this.player.playerConnection.sendPacket(tileentity.getUpdatePacket());
                  }
                  return false;
              }
          }
          if (false && this.gamemode.isCreative() && !this.player.getItemInMainHand().isEmpty() && this.player.getItemInMainHand().getItem() instanceof ItemSword) { // CraftBukkit - false
              return false;
          } else {
              IBlockData iblockdata = this.world.getType(blockposition);
              if (iblockdata.getBlock() == Blocks.AIR) return false; // CraftBukkit - A plugin set block to air without cancelling
              TileEntity tileentity = this.world.getTileEntity(blockposition);
              Block block = iblockdata.getBlock();
  
              // CraftBukkit start - Special case skulls, their item data comes from a tile entity (Also check if block should drop items)
              if (iblockdata.getBlock() == Blocks.SKULL && !this.isCreative() && event.isDropItems()) {
                  iblockdata.getBlock().dropNaturally(world, blockposition, iblockdata, 1.0F, 0);
                  return this.c(blockposition);
              }
  
              // And shulker boxes too for duplication on cancel reasons (Also check if block should drop items)
              if (iblockdata.getBlock() instanceof BlockShulkerBox && event.isDropItems()) {
                  iblockdata.getBlock().dropNaturally(world, blockposition, iblockdata, 1.0F, 0);
                  return this.c(blockposition);
              }
              // CraftBukkit end
  
              if ((block instanceof BlockCommand || block instanceof BlockStructure) && !this.player.isCreativeAndOp()) {
                  this.world.notify(blockposition, iblockdata, iblockdata, 3);
                  return false;
              } else {
                  if (this.gamemode.c()) {
                      if (this.gamemode == EnumGamemode.SPECTATOR) {
                          return false;
                      }
  
                      if (!this.player.dk()) {
                          ItemStack itemstack = this.player.getItemInMainHand();
  
                          if (itemstack.isEmpty()) {
                              return false;
                          }
  
                          if (!itemstack.a(block)) {
                              return false;
                          }
                      }
                  }
  
                  this.world.a(this.player, 2001, blockposition, Block.getCombinedId(iblockdata));
                  // CraftBukkit start
                  world.captureDrops = new ArrayList<>();
                  boolean flag = this.c(blockposition);
                  if (event.isDropItems()) {
                      for (EntityItem item : world.captureDrops) {
                          world.addEntity(item);
                      }
                  }
                  world.captureDrops = null;
                  // CraftBukkit end
  
                  if (this.isCreative()) {
                      this.player.playerConnection.sendPacket(new PacketPlayOutBlockChange(this.world, blockposition));
                  } else {
                      ItemStack itemstack1 = this.player.getItemInMainHand();
  					//ItemStack itemstack2 = itemstack1.isEmpty() ? ItemStack.a : itemstack1.cloneItemStack(); //NeonPaper move up
                      boolean flag1 = this.player.hasBlock(iblockdata);
  					ItemStack itemstack2 = flag && flag1 && event.isDropItems() && !itemstack1.isEmpty() ? itemstack1.cloneItemStack() : ItemStack.a; // NeonPaper - clone before use
  
                      if (!itemstack1.isEmpty()) {
                          itemstack1.a(this.world, iblockdata, blockposition, this.player);
                      }
  
                      // CraftBukkit start - Check if block should drop items
                      if (flag && flag1 && event.isDropItems()) {
                          iblockdata.getBlock().a(this.world, this.player, blockposition, iblockdata, tileentity, itemstack2);
                      }
                      // CraftBukkit end
                  }
  
                  // CraftBukkit start - Drop event experience
                  if (flag && event != null) {
                      iblockdata.getBlock().dropExperience(this.world, blockposition, event.getExpToDrop(), this.player); // Paper
                  }
                  // CraftBukkit end
  
                  return flag;
              }
          }
      }
  
      public EnumInteractionResult a(EntityHuman entityhuman, World world, ItemStack itemstack, EnumHand enumhand) {
          if (this.gamemode == EnumGamemode.SPECTATOR) {
              return EnumInteractionResult.PASS;
          } else if (entityhuman.getCooldownTracker().a(itemstack.getItem())) {
              return EnumInteractionResult.PASS;
          } else {
              int i = itemstack.getCount();
              int j = itemstack.getData();
              InteractionResultWrapper interactionresultwrapper = itemstack.a(world, entityhuman, enumhand);
              ItemStack itemstack1 = (ItemStack) interactionresultwrapper.b();
  
              if (itemstack1 == itemstack && itemstack1.getCount() == i && itemstack1.m() <= 0 && itemstack1.getData() == j) {
                  return interactionresultwrapper.a();
              } else if (interactionresultwrapper.a() == EnumInteractionResult.FAIL && itemstack1.m() > 0 && !entityhuman.isHandRaised()) {
                  return interactionresultwrapper.a();
              } else {
                  entityhuman.a(enumhand, itemstack1);
                  if (this.isCreative()) {
                      itemstack1.setCount(i);
                      if (itemstack1.f()) {
                          itemstack1.setData(j);
                      }
                  }
  
                  if (itemstack1.isEmpty()) {
                      entityhuman.a(enumhand, ItemStack.a);
                  }
  
                  if (!entityhuman.isHandRaised()) {
                      ((EntityPlayer) entityhuman).updateInventory(entityhuman.defaultContainer);
                  }
  
                  return interactionresultwrapper.a();
              }
          }
      }
  
      // CraftBukkit start - whole method
      public boolean interactResult = false;
      public boolean firedInteract = false;
      public EnumInteractionResult a(EntityHuman entityhuman, World world, ItemStack itemstack, EnumHand enumhand, BlockPosition blockposition, EnumDirection enumdirection, float f, float f1, float f2) {
          IBlockData blockdata = world.getType(blockposition);
          EnumInteractionResult enuminteractionresult = EnumInteractionResult.FAIL;
          if (blockdata.getBlock() != Blocks.AIR) {
              boolean cancelledBlock = false;
  
              if (this.gamemode == EnumGamemode.SPECTATOR) {
                  TileEntity tileentity = world.getTileEntity(blockposition);
                  cancelledBlock = !(tileentity instanceof ITileInventory || tileentity instanceof IInventory);
              }
  
              if (entityhuman.getCooldownTracker().a(itemstack.getItem())) {
                  cancelledBlock = true;
              }
  
              if (itemstack.getItem() instanceof ItemBlock && !entityhuman.isCreativeAndOp()) {
                  Block block1 = ((ItemBlock) itemstack.getItem()).getBlock();
  
                  if (block1 instanceof BlockCommand || block1 instanceof BlockStructure) {
                      cancelledBlock = true;
                  }
              }
  
              PlayerInteractEvent event = CraftEventFactory.callPlayerInteractEvent(entityhuman, Action.RIGHT_CLICK_BLOCK, blockposition, enumdirection, itemstack, cancelledBlock, enumhand);
              firedInteract = true;
              interactResult = event.useItemInHand() == Event.Result.DENY;
  
              if (event.useInteractedBlock() == Event.Result.DENY) {
                  // If we denied a door from opening, we need to send a correcting update to the client, as it already opened the door.
                  if (blockdata.getBlock() instanceof BlockDoor) {
                      boolean bottom = blockdata.get(BlockDoor.HALF) == BlockDoor.EnumDoorHalf.LOWER;
                      ((EntityPlayer) entityhuman).playerConnection.sendPacket(new PacketPlayOutBlockChange(world, bottom ? blockposition.up() : blockposition.down()));
                  } else if (blockdata.getBlock() instanceof BlockCake) {
                      ((EntityPlayer) entityhuman).getBukkitEntity().sendHealthUpdate(); // SPIGOT-1341 - reset health for cake
                  // Paper start - extend Player Interact cancellation
                  } else if (blockdata.getBlock() instanceof BlockStructure) {
                      ((EntityPlayer) entityhuman).playerConnection.sendPacket(new PacketPlayOutCloseWindow());
                  } else if (blockdata.getBlock() instanceof BlockCommand) {
                      ((EntityPlayer) entityhuman).playerConnection.sendPacket(new PacketPlayOutCloseWindow());
                  } else if (blockdata.getBlock() instanceof BlockFlowerPot) {
                      // Send a block change to air and then send back the correct block, just to make the client happy
                      PacketPlayOutBlockChange packet = new PacketPlayOutBlockChange(this.world, blockposition);
                      packet.block = Blocks.AIR.getBlockData();
                      this.player.playerConnection.sendPacket(packet);
  
                      this.player.playerConnection.sendPacket(new PacketPlayOutBlockChange(this.world, blockposition));
  
                      TileEntity tileentity = this.world.getTileEntity(blockposition);
                      if (tileentity != null) {
                          player.playerConnection.sendPacket(tileentity.getUpdatePacket());
                      }
                  // Paper end - extend Player Interact cancellation
                  }
                  ((EntityPlayer) entityhuman).getBukkitEntity().updateInventory(); // SPIGOT-2867
                  enuminteractionresult = (event.useItemInHand() != Event.Result.ALLOW) ? EnumInteractionResult.SUCCESS : EnumInteractionResult.PASS;
              } else if (this.gamemode == EnumGamemode.SPECTATOR) {
                  TileEntity tileentity = world.getTileEntity(blockposition);
  
                  if (tileentity instanceof ITileInventory) {
                      Block block = world.getType(blockposition).getBlock();
                      ITileInventory itileinventory = (ITileInventory) tileentity;
  
                      if (itileinventory instanceof TileEntityChest && block instanceof BlockChest) {
                          itileinventory = ((BlockChest) block).getInventory(world, blockposition);
                      }
  
                      if (itileinventory != null) {
                          entityhuman.openContainer(itileinventory);
                          return EnumInteractionResult.SUCCESS;
                      }
                  } else if (tileentity instanceof IInventory) {
                      entityhuman.openContainer((IInventory) tileentity);
                      return EnumInteractionResult.SUCCESS;
                  }
  
                  return EnumInteractionResult.PASS;
              } else {
                  if (!entityhuman.isSneaking() || entityhuman.getItemInMainHand().isEmpty() && entityhuman.getItemInOffHand().isEmpty()) {
                      IBlockData iblockdata = world.getType(blockposition);
  
                      enuminteractionresult = iblockdata.getBlock().interact(world, blockposition, iblockdata, entityhuman, enumhand, enumdirection, f, f1, f2) ? EnumInteractionResult.SUCCESS : EnumInteractionResult.PASS;
                  }
              }
  
              if (!itemstack.isEmpty() && enuminteractionresult != EnumInteractionResult.SUCCESS && !interactResult) { // add !interactResult SPIGOT-764
                  int i = itemstack.getData();
                  int j = itemstack.getCount();
  
                  enuminteractionresult = itemstack.placeItem(entityhuman, world, blockposition, enumhand, enumdirection, f, f1, f2);
  
                  // The item count should not decrement in Creative mode.
                  if (this.isCreative()) {
                      itemstack.setData(i);
                      itemstack.setCount(j);
                  }
              }
          }
          return enuminteractionresult;
          // CraftBukkit end
      }
  
      public void a(WorldServer worldserver) {
          this.world = worldserver;
      }
  }
  